If I were to hand you a piece of canvas, how many different ways are there to set it up as a shelter?

I will be working with some young ones in NC this next week, and they really want to set up tents. (Why? I don't know! ;D) They will have canvas to set up a lean-to, a diamond, a wedge, a one-pole/hunter/pyramid, and a French bell. I really don't want to cart the wall all the way up there, and was hoping to come up with another idea for 1 single piece of canvas.

I thought of using a canoe... but don't know where I'd be able to find one of those at this late date.